MATLAB: I have a matrix A of order 3 X 7 and C is a matrix made

matrix manipulation

I have a matrix A of order 3 X 7 and C is a matrix made of first , fourth and seventh columns of A I Need to find a matrix B of order 7 X 3 such that AB=C
A =
    1.0000    3.0000    5.0000    7.0000    9.0000   11.0000   13.0000   15.0000
    2.5000    2.0000    1.5000    1.0000    0.5000         0   -0.5000   -1.0000
    0.2500    0.5000    1.0000    2.0000    4.0000    8.0000   16.0000   32.0000
C= 1.0000    7.0000   13.0000
    2.5000    1.0000   -0.5000
    0.2500    2.0000   16.0000

Best Answer

 B=A\C
B =
    1.0000    0.3445   -0.0766
         0         0         0
         0         0         0
         0         0         0
         0         0         0
    0.0000    0.7943    0.7679
         0         0         0
   -0.0000   -0.1388    0.3086
>> A*B
ans =
    1.0000    7.0000   13.0000
    2.5000    1.0000   -0.5000
    0.2500    2.0000   16.0000
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